The U.S. says there will be a "firm response" as Ukrainian forces holding ground in Russia's Kursk region now face North Korean troops "engaging in combat."

The Russians launched a combined attack on Ukraine on the night of 12-13 November, firing cruise and ballistic missiles and almost 100 Shahed attack drones. Source: Ukraine's Air Force Quote: "In total,

Russia attacked the Ukrainian capital Kyiv with a sophisticated combination of missiles and drones for the first time in 73 days on Wednesday, authorities reported, as the Pentagon said most of the North Korean troops sent to help Moscow’s war effort are fighting to drive Ukraine’s army off Russian soil in the Kursk border region.